Tooth for excavating-shovels.



NQ. 888,046.. PATENTED MAY 19, 1908.

' J. M SHERRERD.

TOOTH POR EXGAVATING SHOVELS.

APPLICATION FILED APR. 1, 1907. BENEWED NOV,20, 1907.

'ff-@FM UNITED sTATns PATENT OFFICE.

JOHN M. SHERRERD, OF EASTON,'PENNSYLVANIA, ASSIGNOR TO TAYLOR IRON AND STEEL COMPANY, OF IIIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TOOTH FOR EXCAVATING-SHOVELS.

Specification of Letters Patent.

' Patented May 19, 1908.

Application led April 1, 1907, Serial No. 365,671. Renewed November 20, 1907. Serial No, 403,074.

To all whom 'it may concern:

Beit known that I, JOHN M. SHERRERD, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Teeth for Excavating-Shovels, of which the following is a specification.

This invention relates to teeth for excavating buckets or shovels, the object of the invention being to rovide an improved twopart tooth in wbic the detachable and reversible point is connected to the tooth portion or base in an im roved manner.

A further object of t e invention is the provision of an improved detachable and reversible point.

In the drawings accompanying and forming part of this specification, Figure .1 is a side view of this improved twoart tooth attached to an excavator shove, which is shown partly in section and broken away; Fig. 2 is a view similar to Fig. 1, but with the 'shank of the tooth portion broken away and illustrating a somewhat different mode of attaching the point to the nose; Fig. 3 is a perspective view, enlarged, of the tooth portion or base of the tooth, with the shank thereof broken away; and Fig. 4 is a perspective view of this improved point.

Similar characters o reference indicate corresponding arts throughout the different figures of the rawings.

This improved two-part tooth comprises a tooth or body portion or base 2 and a detachable and reversible oint 3. The tooth portion is recessed to orm a pair of Shanks or jaws 4 and 5, one of which, as for instance the upper, is usually longer than the other, and which jaws are bolted to the bucket by suitable bolts 6, the forward edge or lip 7 of thebucket fitting snugly in said recess, being engaged by the forward or end wall 8 of such recess, so that thrust on the tooth is imparted directly to the bucket lip, and not through the medium of bolts thereto. The body of the tooth is provided with a tapered nose 9 having a rounded end 10, which nose is recessed or rabbeted to form a pair of vertically extended shoulders 11 extending laterally from the side faces of the nose. At the base of the nose a pair of transversely extending shoulders 17 and 18 are provided. These shoulders are located iii the rear of the end wall 8 of the recess which receives the lip or blade of the bucket or shovel, whereby a relatively long bearin is provided for the detachable and reversibe point and whereby also the shoulders may be formed at a oint where there is considerable stock, wit out the necessity of enlarging or forming a bulging nose.

Projecting from the nose, at the top and bottom thereof, at cach side edge, is a stop or lug 12 and 13, which extend in the direction of the nose and preferably terminate at the shoulder. The detachable and reversible wedge-shaped point 3 is bifurcated to form a pair of jaws 14 and 15, which are connected at the sides thereof by webs 16 and 30 forming a pocket 31 into which the forwardly extending portion 19 of the nose projects. By this organization the point 1s interlocked with the nose, the jaws thereof preventing movement in a vertical )lane, while the side webs prevent lateral. p ay or movement of the point, this also being prevented by the lugs hereinbefore referred to, between which a ortion `of each jaw projects, this portion being in the forni of a projection or surface 20 formed on each opposing face of the jaw. It will be obvious, of course, that this organization may be reversed, and the lugs formed on the jaws instead of on the nose if desired. The provision of the webs connecting the jaws prevents the spreading of such jaws as well as the lateral movement or play of the point relative to the tooth portion or base hereinbefore referred to, and accomplishes these desirable features without the necessity of bifurcating the nose for the reception of a centrally located web, and thus does Vaway with the necessity of machining the side walls of such bifurcated portion, for which purpose special tools are required.

The points are preferably made of steel castings, such for instance as manganese steel, a number being preferably sup lied with each shovel, and if desired, the we s of the points may be provided with openings therethrough so that anyl accumulation of dirt or rust which might gather in the pocket and interfere with the proper fitting of the point on its tooth may be removed.

In practice the work which these teeth have to do wears away the point, the major part of such wear being on the underside of the point, so that their efficiency is gradually lessened until they become unfit for use owing to the bluntness of the point. With when the point has been worn to such a blunt condition that it is not e'llcient to do proper work, to remove the point and supply a new one. But by providing a reversible point the life thereof is very materially prolonged. W'hen it becomes blunt itis, as stated, unfit for use, as it will not properly penetrate and do ellicient work, but by reversing the point, that part thereof which is at the upper side of the point will be brought into position to do proper and efiicient work. Thus, the point may be considered as ractically self sharpening, since after it ,i reversed and again becomes worn away in the manner indicated, all that is necessary is to again reverse the oint into its original position. Thus, the hfe of the point is very materially prolonged, such point being capable of use without removal and reformation until practically worn down to the nose of the tooth. The point, however, in order to be reversible in a practicable manner, must have its cutting or penetrating part when reversed in substantially the same lane as this part was in prior to its reversa and to accomplish this it must have both of its jaws terminating in about the same position with relation to the nose of the tooth and must also have each of the jaws engage the nose at about the same distance from the center line of such nose. This is accomplished by so locating the jaws I with relation to a line (see c-c) intersecting the apex of the point and the juncture point of the jaws that each jaw will have its free end at about the same distance from that line when continued through the nose of the tooth, and the nose of the tooth must be correspondingly so formed that when the point is reversed this point will have the same position ywith relation to the bucket or shovel lip and will always be in the same cutting plane, with its thrust substantiallyr in line with the lip or wall of the bucket to which the tooth is connected. In other words, the relation of the tapered nose of the tooth to the bucket lip should be such that the working end of the point will be substantially in line with such lip, and therefore in line with the strain, whereby liability of pulling off the point is prevented. This is obtained by so locating the nose that the end thereof is substantially in the same plane as the bucket lip, while the working end of the point is not very materially above lthe plane of the underside of the tooth at the rear of its nose. I do not, however, claim a reversible tooth broadlyT herein and independently of the improved manner of connecting the point to -the nose.

For the urpose of rigidly attaching the point to tlie nose a bolt 21 is provided, shown passing through the point and the nose, a nut 22 on one end being'located in a socket of one of the point jaws, thereby to secure the bolt in posltion. By forming the point with side webs instead of a centrally ocated web, which latter necessitates, as hereinbefore stated, the formation of a recess in the nose, I am able to locate the bolt connecting the point to the nose at any desired point, an if desired am also able to bolt the oint to the nose by means of several bolts, wi located in lanes crossing each other, as shown in Figs. 2 and 4. And if additional security is desired I can also provide a hol'izontally located bolt or rivet passing through the side webs and the forwardly projecting portion of the nose, thus locking the point to the nose .by bolts which pass both perendicularly and horizontally therethrough.

n the resent construction it will be observed t at the point is attached to the nose in an extremely rigid and effective manner, being interlocked therewith not only by the side webs forming the pocket into which the nose projects, but also by the interlocking lugs at the rear of the point Webs and the ch may be angularly disposed andnose, as well as by the several bolts which Y may be provided for this pur ose.

This improved point, it w l be observed, is not merely reversible when worn into that condition, but the carrying member or body portion and the point are so made in the preerred form, as set forth, that the point can be assembled with either side up, the point thus being constructed as a reversible point, so that such point is reversible not only after it has become worn, but is reversible prior to any wear thereon. This avoids the necessity of its always being attached to the nose of the body in one particular manner to properly do its work.

Smce the point can be attached, because of its mode of construction, with either side up, as both sides terminate in the preferred construction in the same formation of the point, it follows that the present improved point is reversible in the broadest sense of that term, since, as stated, before it has become worn at all it is reversible, so that it may be con- .sidered as a preformed or reversibly constructed point, that is, one constructed or formed reversible before it is attached to the nose, thus ermitting it, as stated, to be attached with) either side up.

I claim as my invention: 1. A detachable point of the class specified, bifurcated to form a pair of rearwardlyextending jaws united one to the other by a wardly of said nose recessed to form a pair of latera '4.' A detachable, wede-shapedpocketed 'point of the class specific havlng anppening extending transversely through the sidewalls of the pocket, anda pair of jaws extending rearwardlyrof said pocket. l i

5. A detachable, pocketed, wedge-shaped point of the class specified, havlngdaws extending rearwardly of such pocket and provided with means. thenose ortion of a tooth.

6. A etachable and reversible wedgesha ed point of the class specified, havlng a poc et, and a pair of jaws extending rearocket. V l 7. A detachable and reversible point of the class specified, bifurcated to form a pair' of jaws united by a pair of webs. A

8. A detachable and reversible pomt of the class specified, bifurcated -to form a pair of jaws. united by a pair of webs located at the sides of said oint. j

9. A detac' able and reversible, wedgesha ed point of the class specified, having a poc et, and a pairof 'aws -extending rearwardly f said pocket, oth of substantially the same length. i i

10. A detachable and reversible point, bi'- furcated to form a air of jaws of substantially the same length, and a pair of integral webs uniting said jaws, said jaws extending rearwardly of said webs and each located at substantially the same distance from a line intersecting the apex and the juncture points of said jaws;

11. A detachable and reversible oint, comprising an a proximately wedge-s ape'd piece of metal aving a pocket and bifurcated to form a air ef jaws, each of said jaws bein located) at substantially the same distance igrom ,a line intersecting the a ex and the juncture points of said jaws and eing of substantial y the same length.

12. A shovel tooth, having a pro'ecting Jlly extending shoulders.

13. A shovel tooth, having a pro'ecting, tapered nose provided on its top and ottom surfaces with a pair of lugs or projections.

14. A shovel tooth, comprising a body portion having a recess, and a tapering nose portion projecting forwardly from such body portion 'and havmg a pair of shoulderslo,

cated in .the rear of the front wall of said recess and having in front of said shoulders, on the top and bottom thereof, a pair of projections or lugs extending in the direction of said nose and located at each side thereof.

15. A shovel tooth, comprising a body portionvhaving a recess, and a tapering nose portion projecting forwardly from such body portion and havin a pair of shoulders located in the rear o the' front wall of said recess and having in front of said shoulders, on the top and bottom thereof, a pair of projections or lugs extending in the direction of for interlocking them with t tended, tapered nose provided with a'pa1r of saidnose and located at each side thereof,

said nosel also havinga pair of laterally extending shoulders.

16. A shovel tended, tapered nose provided with a plair of laterally extending shoulders, and on t e top and bottom thereof with a pair of vertically extendin lugs or projections. l A

' 17 A s ovel tooth, having a forwardly exlaterally extendin -shoulders and on its'to .and bottom,' at t e rear 'of said nose, wit

meansfor interlock-ingi it with a point.

18. A shovel` tooth tended, tapered nose provided with a pair of laterally extending shoulders and on its to and bottom, at the rear of said nose, with means for interlocking it `withva point and having in the rear of said interlocking means a pair of transversely located shoulders. 19. A tooth of the class described, comprising a tooth or body portion having a pair aving a forwardly exl.

tooth having a forwardly exof jaws and a forwardly extended nose, and a detachable and reversible point having a' pocket for the reception of said nose'and a pair of jaws extending rearwardly of' said pocket. j

' 20. A tooth having a forwardly projecting nose, and a detachable and reversible point bifurcated to form a lair of jaws lembracing said nose, said jaws eing united by apail of webs located one at each side thereof.

21. A tooth having a forwardly projecting.

nose provided with a air of lateral y extending s oulders, and a etachable and reversible point bifurcated to form a air of jaws embracing said nose, said jaws eing united by a air of webs terminating adjacent to the shou ders of said nose.

22. A tooth having a forwardly projecting nose, and a detachable and reversible point bifurcated to form a pair of jaws -embracin said nose, said jaws bein united by a air o webs located one at eac side of sai nose, and means for inde endently interlocking the. jaws with the bo y` ortion of the tooth.

23. A tooth having a orwardly rojecting nose rovided with a air of lateral y extendings oulders, and a etachable and reversi'- ble point bifurcated to form a air of jaws embracing said nose, said jaws eing united by a air of webs terminating adjacent to the shou ders of said nose, and'means for independently interlocking the jaws with the lody portion of said tooth.

24. A tooth having a forwardly projecting Vnose provided with a pair of laterally extending shoulders, and adetachable and reversible point bifurcated to form a pair of by a air of webs terminating adjacent to the shou ders of said nose, and means for independently interlocking the jaws with said nose, comprising projections or lugs carried by said jaws and nose, a pair thereof being carried by said nose on its top and bottom faces.

26. A two-part tooth of the class specified, comprising a tooth portion having means for attachment to a shovel or bucket and provided with a nose portion' projecting forwardly therefrom, and a detachable and .reversible point, and bolts located in intersecting planes connecting said pointwith said nose.

27. A two-part tooth of the class specified, comprising a tooth portion having means for attachment to a shovel or bucket and provided with a tapered nose extended forwardly therefrom, and a detachable point bifurcated to form a pair of jaws united by a pair of webs forming a pocket for the recepv tion of the nose, and fastenmg means extending through said webs and nose for securing the point to the nose.

28. A two-part tooth vof the class specified, comprising a tooth' portion having means for attachment to a shovel or bucket and provided with a tapered nose extended forwardly therefrom, and a detachable point bifurcated to form a pair of jaws united by a pair of webs forming a pocket for the reception of the nose, fastening means extending through said webs and nose for securing the point to the nose, and fastening means passing through the jaws and nose transversel to the fastening means extending through the webs and nose.

29. A two-part tooth of the class specified, comprising a tooth portion having means for attachment to a shovel or bucket and provided with a tapered nose extended forwardly therefrom, and a detachable point bifurcated to form a pair of jaws united by a pair of webs forming a pocket for the reception of the nose, fastening means extending through said webs and nose for' securing the oint to the nose and fastening means passlng through the jaws and nose transversel to the fastening means extending through the webs and nose and comprising a pair of bolts located in intersecting lanes.

30. A\twopart shovel toot comprising a body ortion having means for attachment to a s ovel or bucket and provided with a forwardly extended ta ered nose, and a detachable and reversib e point comprising a wedge-sha ed piece of metal having a pair of rearward y extending jaws united by a pair of webs forming a pocket for the recep- 65 tion of a portion of the nose, said nose and point havlng substantially the same amount of metal located at each side of a line intersectin the apices of the nose and the point, where the point is reversible. 31. two-part shovel tooth, com rising vthe oint is reversible, and means for indeen ently interlocking the point with the ody portion.

32. A two-part shovel tooth, comprising a body portion having means for attachvment to a shovel or /bucket and provided with a forwardly extended tapered nose, and a detachable and reversible point comprising a wedge-sha ed piece of -metal having a pair' of rearward y extending jaws united by a pair of webs forming a pocket for the reception of a portion of the nose, said nose and point havlng substantially the'same amount of metal located at each side of a line intersecting the apices of the nose and the point, where y the point is reversible, and means for independently interlocking the point with the body portion and comprlsing interlocking projections.

33. A two-part shovel tooth, comprising a body portion having means for attachment to a shovel or bucket and provided with a forwardly extended tapered nose, and a detachable and reversible point comprising a wedge-sha ed piece of metal havina pair of rearward y extending jaws united y a pair of webs formin a pocket for the reception of a portion o the nose, said nose and point having substantially the same amount of metal located at each side of a line intersecting the apices of the nose and the point, whereby the oint is reversible, and means for indepen ently interlocking the point with the body portion and comprising interlocking projections terminating 1n a pair of shoulders extending crosswise of the body ortion.

34. A s ovel tooth having a tapered nose and a pocketed detachable and reversiblyconstructed point into which said nose proj jects.

Signed at 9-15 Murray st., New York, N. Y.

JOHN M. SHERRERD.

Witnesses: l

C. P. WEED, F. E. BoYoE. 

